COMMUNITY FORUM

Basement - Pressure treated or not

I have an unfinished, studded basement in Atlanta, GA. The basement was studded out by the builder when the house was built about five years ago. The 2x4s that have direct contact with the basement floor appear to be glued down, non-pressure treated wood. Also, I am starting to finish the basement and the contractor nailed some non-pressure treated wood to the floor. Does the wood need to be pressure treated? Is there any product I can use after-the-fact to protect the wood?